fix(tmq): quit the scan asap.

source/libs/executor/src/executor.c

@@ -755,8 +755,8 @@ int32_t qKillTask(qTaskInfo_t tinfo, int32_t rspCode) {
     return TSDB_CODE_QRY_INVALID_QHANDLE;
   }
 
-  qDebug("%s execTask async killed", GET_TASKID(pTaskInfo));
-  setTaskKilled(pTaskInfo, rspCode);
+  qDebug("%s sync killed execTask", GET_TASKID(pTaskInfo));
+  setTaskKilled(pTaskInfo, TSDB_CODE_TSC_QUERY_KILLED);
 
   while(qTaskIsExecuting(pTaskInfo)) {
     taosMsleep(10);

source/libs/executor/src/scanoperator.c

@@ -772,7 +772,7 @@ static SSDataBlock* doTableScan(SOperatorInfo* pOperator) {
 
     while (1) {
       SSDataBlock* result = doGroupedTableScan(pOperator);
-      if (result || (pOperator->status == OP_EXEC_DONE)) {
+      if (result || (pOperator->status == OP_EXEC_DONE) || isTaskKilled(pTaskInfo)) {
         return result;
       }
 
@@ -1666,6 +1666,8 @@ static SSDataBlock* doQueueScan(SOperatorInfo* pOperator) {
   if (pTaskInfo->streamInfo.prepareStatus.type == TMQ_OFFSET__LOG) {
     while (1) {
       SFetchRet ret = {0};
+      terrno = 0;
+
       if (tqNextBlock(pInfo->tqReader, &ret) < 0) {
         // if the end is reached, terrno is 0
         if (terrno != 0) {